KS8995M
Micrel
Table of Contents
System Level Applications .........................................................................................................................................
7
Pin Description (by Number) ......................................................................................................................................
9
Pin Description (by Name) ........................................................................................................................................
15
Pin Configuration ......................................................................................................................................................
21
Introduction
........................................................................................................................................................... 22
Functional Overview: Physical Layer Transceiver ................................................................................................
22
100BaseTX Transmit ........................................................................................................................................... 22
100BaseTX Receive ............................................................................................................................................ 22
PLL Clock Synthesizer ......................................................................................................................................... 22
Scrambler/De-scrambler (100BaseTX only) ........................................................................................................ 22
100BaseFX Operation ......................................................................................................................................... 22
100BaseFX Signal Detection ............................................................................................................................... 22
100BaseFX Far End Fault ................................................................................................................................... 23
10BaseT Transmit ............................................................................................................................................... 23
10BaseT Receive ................................................................................................................................................ 23
Power Management ............................................................................................................................................. 23
MDI/MDI-X Auto Crossover ................................................................................................................................. 23
Auto-Negotiation .................................................................................................................................................. 23
Functional Overview: Switch Core ..........................................................................................................................
24
Address Look-Up .................................................................................................................................................
Learning ...........................................................................................................................................................
Migration ...........................................................................................................................................................
Aging
...........................................................................................................................................................
Forwarding ...........................................................................................................................................................
Switching Engine .................................................................................................................................................
MAC Operation ....................................................................................................................................................
24
24
24
24
24
24
24
Inter-Packet Gap (IPG) ................................................................................................................................ 24
Backoff Algorithm ......................................................................................................................................... 24
Late Collision ............................................................................................................................................... 26
Illegal Frames .............................................................................................................................................. 26
Flow Control ................................................................................................................................................. 26
Half-Duplex Back Pressure .......................................................................................................................... 26
Broadcast Storm Protection ......................................................................................................................... 26
MII Interface Operation ........................................................................................................................................ 26
SNI Interface Operation ....................................................................................................................................... 28
Advanced Functionality ............................................................................................................................................
28
Spanning Tree Support ........................................................................................................................................ 28
Special Tagging Mode ......................................................................................................................................... 29
IGMP Support ...................................................................................................................................................... 30
Port Mirroring Support ......................................................................................................................................... 31
VLAN Support ...................................................................................................................................................... 31
Rate Limit Support ............................................................................................................................................... 32
Configuration Interface ........................................................................................................................................ 33
I2C Master Serial Bus Configuration ............................................................................................................ 35
SPI Slave Serial Bus Configuration ............................................................................................................. 35
MII Management Interface (MIIM) ....................................................................................................................... 38
M9999-120403
4
December 2003